Security of quantum cryptography using balanced homodyne detection

被引：56

作者：

Namiki, R ^{[1
]}

Hirano, T ^{[1
]}

机构：

[1] Gakushuin Univ, Dept Phys, Toshima Ku, Tokyo 1718588, Japan

来源：

PHYSICAL REVIEW A | 2003年 / 67卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.67.022308

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper we investigate the security of a quantum cryptographic scheme which utilizes balanced homodyne detection and weak coherent pulses (WCP). The performance of the system is mainly characterized by the intensity of the WCP and postselected threshold. Two of the simplest intercept and resend eavesdropping attacks are analyzed. The secure key gain for a given loss is also discussed in terms of the pulse intensity and threshold.

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页数：7

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